n. (pl. same) a small freshwater fish, esp. Rutilus rutilus, allied to the carp.
Etymology: ME f. OF roc(h)e, of unkn. orig.
2.
n.
1 US colloq. a cockroach.
2 sl. the butt of a marijuana cigarette.
Etymology: abbr.
3.
n. Naut. an upward curve in the foot of a square sail.
Etymology: 18th c.: orig. unkn.
Useful english dictionary. 2012.